a = 1
def fun(a):
a = 2
fun(a)
print a # 1
a = []
def fun(a):
a.append(1)
fun(a)
print a # [1]相关文章：
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a = 1
def fun(a):
a = 2
fun(a)
print a # 1
a = []
def fun(a):
a.append(1)
fun(a)
print a # [1]相关文章：